TN_US-BA-e-2020 5
1.2 General functions
A wide range of materials can be measured, including metals, plastics, ceramics,
composites, epoxy, glass and other ultrasonic wave conductive materials.
For special applications, certain models of sounders are available, especially for
coarse-grained materials and high-temperature applications.
• Zero setting and sound velocity calibration function.
• Two-point calibration function
• two working methods: single point mode and ultrasound image mode (scan
mode)
• Coupling status display shows the coupling status.
• The battery information shows the remaining capacity of the battery.
• "Auto Sleep" and " Auto Power off" function to conserve battery power.
• Software for TN xx0.01 US available on request to transfer memory data to the
PC
• Mini thermal printer available on request to print the measured data from the
TN xx0.01 US via the RS-232 connection adapter.
1.3 Measuring principle
The Ultrasonic Digital Material Thickness Gauge measures the thickness of a part or
structure by accurately measuring the time taken for a short ultrasonic pulse to pass
through the thickness of a material, controlled by a transducer, then reflected from the
back or inner surface and returned to the transducer.
This measured two-way transmission time is divided by 2 (representing the outward
and return paths), and then multiplied by the sound velocity of the corresponding
material. The result is calculated with the following
formula:
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